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Broadband light-extraction enhanced by arrays of whispering gallery resonators
Technical University of Denmark, Lyngby.
Technical University of Denmark, Lyngby.
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, The Institute of Technology.
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2012 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 101, no 24Article in journal (Refereed) Published
Abstract [en]

We demonstrate a light-extraction approach using a whispering gallery resonators array. The wavelength-scale resonant dielectric nanospheres support whispering gallery modes, which can be coupled with the confined waveguide modes inside the bulk material, thus dramatically improving light extraction. Broadband light-extraction enhancement across the entire visible spectral range is achieved by exciting three low-order and low-quality-factor resonances. As an example, the broadband extraction enhancement of about 50% is obtained for the emission of fluorescent SiC at all the tested angles. The experimental results are supported by numerical simulations. Our light-extraction strategy could enable the manufacturing of high-throughput, nondestructive, and affordable optical coating in a variety of optical devices.

Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2012. Vol. 101, no 24
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:liu:diva-86231DOI: 10.1063/1.4771124ISI: 000312490000008OAI: oai:DiVA.org:liu-86231DiVA: diva2:575942
Available from: 2012-12-11 Created: 2012-12-11 Last updated: 2017-12-07

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Jokubavicius, ValdasSyväjärvi, Mikael

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